Seiko Cal. 6637 - 357

Seiko 6637-357

This Automatic model from 1999 features a 36mm Stainless Steel case. With its 19mm lug width and 12.3mm profile, it sits comfortably on most wrists. [seikata-wm-84542e81395c]

Also known as: Tuna, Helmet

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
12.3mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
200m
Dial Color
Silver
Jewels
21j
Frequency
28,800 bph
Power Reserve
42 hours
Year
1999

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seikata-wm-84542e81395c